ohm setting ?

[cheapskete OCer]

i dont see much of car audio on here ..but im getting this amp for my car off ebay and it says this on the specs Thunder 204 Amplifier

--------------------------------------------------------------------------------
RMS Power measured at 12.5 Volts DC:
25 Watts x 4 into a 4 Ohm load with less than 0.1% Thd+N
50 Watts x 4 into a 2 Ohm load with less than 0.3% Thd+N
100 Watts x 2 bridged into a 4 Ohm load with less than 0.3% Thd+N

Dynamic Power (IHF-202 Standard) measured at 14.4 Volts DC
65 Watts x 4 into a 4 Ohm load
125 Watts x 4 into a 2 Ohm load
250 Watts x 2 bridged into a 4 Ohm load

Signal to Noise Ratio:
110dB A-Weighted

Damping Factor:
>200

Frequency Response:
20Hz-20kHz±0.25dB

Maximum Input:
8Vrms



i dont know anything about ohms...but how is it i get 125w x4 in 2 ohm versus 65w x 4 in 4 ohm.....and how are you able to choose what ohm you run in.......thanks

 

[JMO_PWR]

Thats because this is a section for Home Theatre. Try the general Discussion, section.

 

[annunaki]

The impedance on a car amplifier (or any amplifier) is dictated by the loudspeaker connected to it. There is no switch. There are two ohm speakers available, to get two ohm power. If you want more power into 4 ohms, buy a bigger amplifier. Also, only pay attention to the 12.5 Volt ratings, as they are the closest to real world output.